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ipc: convert prepare_copy() from macro to function 

This code works if CONFIG_CHECKPOINT_RESTORE is disabled.

[akpm@linux-foundation.org: remove __maybe_unused]
Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: James Morris <jmorris@namei.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Stanislav Kinsbursky 2013-01-04 15:35:00 -08:00 committed by Linus Torvalds
parent 85398aa8de
commit b30efe2775
1 changed files with 9 additions and 2 deletions
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11
ipc/msg.c
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@ -803,8 +803,15 @@ static inline void free_copy(struct msg_msg *copy)
free_msg(copy);
}
#else
#define prepare_copy(buf, sz, msgflg, msgtyp, copy_nr) ERR_PTR(-ENOSYS)
#define fill_copy(copy_nr, msg_nr, msg, copy) NULL
static inline struct msg_msg *prepare_copy(void __user *buf, size_t bufsz,
int msgflg, long *msgtyp,
unsigned long *copy_number)
{
return ERR_PTR(-ENOSYS);
}
static inline void free_copy(struct msg_msg *copy)
{
}
@ -819,7 +826,7 @@ long do_msgrcv(int msqid, void __user *buf, size_t bufsz, long msgtyp,
int mode;
struct ipc_namespace *ns;
struct msg_msg *copy = NULL;
unsigned long __maybe_unused copy_number;
unsigned long copy_number = 0;
if (msqid < 0 || (long) bufsz < 0)
return -EINVAL;